Colitis, Ulcerative ; classification ; diagnosis ; pathology ; Humans ; Inflammation ; Medicine, Chinese Traditional

AIM: To investigate the angiogenesis in the process of sarcoma 180 (S_(180)) tumor transplantation and changes of regulator factors, and explore the possible mechanism. METHODS: The S_(180) transplanted tumor in the Km mouse was used to detect the tumor angiogenesis by immunohistochemical examination of FⅧ. The levels of VEGF (V) and endostatin (E) in serum and the homogenate of tumor tissue were measured by ELISA and EIA, and the correlation between tumor weight and microvessel count (MVC) and morphology in tumor was also analyzed by multiple ANNOVA method. RESULTS: MVC, the relative count of total vessels and relative total vessel area increased with the development of transplanted S_ 180 . VEGF level in tumor tissue were higher at the 10th and 15th day than the 5th day after tumor transplantation. Endostatin in the tumor tissue and serum both reached the highest level at the 15th day, V/E ratio did not changed in this process. Furthermore, MVC, average vessel area and relative total area had a significant correlation with tumor weight. CONCLUSION: MVC increases in the development of S_(180) transplantation tumor and is related with the tumor weight; the positive regulator of angiogenesis in the tumor tissue is up-regulated during tumor growth, and the regulators in the tumor tissue maintains a relative balance.

The clinicopathological data of 173 cases of inflammatory myofibroblastic tumor (IMT)were retrospectively analyzed.Among them 125 were males and 48 females with a mean age of 47.9 y (5-78 y).The lesions of 117 cases were located in lungs,41 cases in eyes,8 in ileocecum,2 in liver,2 in spleen,1 in abdominal wall,1 in maxillary sinus and 1 in face.The average diameter of lesions were 3.5 cm,ranging from 1.0 cm to 7.0 cm.The clinical manifestations were not specific,depending on the locations of tumor.The imaging examinations were helpful for diagnosis.The prcsence of slender-spindled myofibroblasts and proliferation of fibroblast cells,with infiltration of chronic inflammatory cells were the basic histopathological features of the disease.Combined with the histological characteristics and immunohistochemical staining IMT can be differentiated from other spindle cell tumors.Appropriate surgical resection is the main treatment for IMT.

Animals ; Apoptosis ; Hippocampus ; pathology ; Male ; Neurons ; pathology ; Physical Conditioning, Animal ; Rats ; Rats, Sprague-Dawley ; Stress, Psychological ; pathology

Objective To prepare monoclonal antibody(McAb) against human tissue kallikrein (HK) and develop an ELISA kit allows for the in vitro quantitative determination of human tissue kallikrein in urine. Methods To generate a monoclonal antibody specific for TK, the synthetic TK peptide consisting of 12 amine acids(12P), was fused to keyhole limpet hemocyanin(KLH) and used for immunization. Using hybridoma screening, monoclonal secreting cell lines were identified and used to generate ascites in BALB/c mouse. Antibody was purified by affinity column chromatography. 12% SDS-PAGE and Western blot were used to visualize the purified antibody. This kit employs indirect competitive ELISA technique and BiotinAvidin System. 12P was fused to bovine serum albumin(BSA) and has been pre-coated onto a microplate at first. Standards and samples were added to the appropriate microplate wells with a biotin-conjugated McAb croplate well. A TMB substrate solution is added to each well. The enzyme-substrate reaction is terminating by the addition of a sulphuric acid solution and the color change is measured spectrotometrically at a wavelength of 450 nm. The concentration of tissue kallikrein in the samples is then determined by comparing the O.D. of the samples to the standard curve. Results 8 hybridoma cell lines secreting mAbs special to HK,SDS-PAGE and Western blot demonstrated successful preparing and purification of McAb( 100% ). The linearity of this ELISA kit is demonstrated(r =0. 990). The range of detection of the assay is 0.008 μg/ml to 0. 5 μg/ml. The assay remained stable, with no change in the values measured, over five cycles of freezing and thawing. Conclusion 8 McAbs against HK have been prepared successfully and possess high titer and specificity. The development of an ELISA kit for detecting HK can meet the needs of detection of HK in urine samples.

ADAM Proteins ; blood ; immunology ; ADAMTS13 Protein ; Adult ; Female ; Humans ; Male ; Middle Aged ; Plasma Exchange ; Purpura, Thrombotic Thrombocytopenic ; blood ; pathology ; therapy

Aim To study the effect of simvastatin(Sim) on left ventricular remodeling and heart function in rats with myocardial infarction(MI).Methods Myocardial infarction models were successfully induced by ligation of anterior descending coronary artery.24 h later the survivals were randomly divided into 3 groups.① MI group;② 20 mg Sim group(20 mg?kg~(-1)?d~(-1));③ 40 mg Sim group(40 mg?kg~(-1)?d~(-1)).The rats with sham ligation formed sham group.After 8 weeks,hemodynamic parameters,blood serum lipids,the ratio of RV and LV weight to body weight(RVWI,LVWI) were examined.The pathomorphological change and the collagen volume fraction(CVF) were analyzed by PSR dyeing.Results There were no significant differences in values of serum lipids among 4 groups.Compared with sham group,the left ventricular end-diastolic pressure(LVEDP) was increased and left ventricular systolic pressure(LVSP) was depressed significantly in MI group; the RVWI and LVWI and the CVF in border infarcted zone and Ⅰ/Ⅲ ratio were increased in MI group too.Compared with MI group,Sim partially normalized LVSP and LVEDP;abated ventricular weight index;reduced CVF in non-infarction zone in both Sim groups.Conculusion Simvastatin improves LV remodeling and heart function in rats with MI,which is associated with the effect of limiting myocardial hypertrophy and interstitial fibrosis.

Aim To assess the effect of HMG-CoA inhibitors simvastatin on collagen remodeling in rats after myocardial infarction. Methods Myocardial infarction models were induced by ligation of anterior descending coronary artery. 24 hours later the survivals were randomly divided into 3 groups: (1) MI group; (2) 20 mg Sim group(20 mg? kg-1? d-1); (3) 40 mg Sim group(40 mg? kg-1? d-1). Rats with sham ligation formed into Sham group. After 8 weeks, the ratios of LV and RV weight to body weight (RVWI, LVWI) were examined and the collagen content was detected. The type Ⅰ and type Ⅲ collagen volume fraction (CVF) and Ⅰ/Ⅲ ratio in infarcted and non-infarcted zones were examined with PSR dyeing; also the mRNA expressions of type Ⅰ and type Ⅲ collagen in non-infarcted zone (NIZ) were detected with RT-PCR.Results Comparing with Sham group,the RVWI and LVWI in MI group increased significantly. The type Ⅰ CVF and type Ⅲ CVF in NIZ and the Ⅰ/Ⅲ ratio were increased in MI group. The mRNA expressions of type Ⅰ and type Ⅲ collagen in NIZ in MI group were higher than those in Sham group. Comparing with MI group, the RVWI and LVWI in both Sim groups were decreased significantly. The type Ⅰ CVF and type Ⅲ CVF in NIZ and the Ⅰ/Ⅲ ratio were depressed in both Sim groups, and the mRNA expressions of collagens were also lower than those in MI group, but higher than those in Sham group. Conculusion Simvastatin could attenuate the development of myocardial interstitial fibrosis in non-infarction zone to improve myocardial interstitial remodeling in rats after MI.

Mononuclear cells(MNCs) isolatedfrommammal'sbonemarrowandperipheral bloodbymeansof Ficoll density grandient centrifugation,which are composed of monocytes and lymphocytes,can differentiate into different progenitor cells with different functions in the development of atherosclerosis under different inducing conditions. This article described the induction conditions of MNCs,the identification methods of different progenitor cells,and the relationship between these progenitor cells and the development of atherosclerosis,thus provide a new idea for the prevention of the atherosclerosis.

The purpose of the study is to construct R8 peptide (RRRRRRRR) and pH sensitive polyethylene glycols (PEG) co-modified liposomes (Cl-Lip) and utilize them in breast cancer treatment. The co-modified liposomes were prepared with soybean phospholipid, cholesterol, DSPE-PEG2K-R8 and PEG5K-Hz-PE (pH sensitive PEG). The size and zeta potential of Cl-Lip were also characterized. The in vitro experiment demonstrated that the Cl-Lip had high serum stability in 50% fetal bovine serum. The cellular uptake of Cl-Lip under different pre-incubated conditions was evaluated on 4T1 cells. And the endocytosis pathway, lysosome escape ability and tumor spheroid penetration ability were also evaluated. The results showed the particle size of the Cl-Lip was (110.4 ± 5.2) nm, PDI of the Cl-Lip was 0.207 ± 0.039 and zeta potential of the Cl-Lip was (-3.46 ± 0.05) mV. The cellular uptake of Cl-Lip on 4T1 cells was pH sensitive, as the cellular uptake of Cl-Lip pre-incubated in pH 6.0 was higher than that of pH 7.4 under each time point. The main endocytosis pathways of Cl-Lip under pH 6.0 were micropinocytosis and energy-dependent pathway. At the same time, the Cl-Lip with pre-incubation in pH 6.0 had high lysosome escape ability and high tumor spheroid penetration ability. All the above results demonstrated that the Cl-Lip we constructed had high pH sensitivity and is a promising drug delivery system.
Animals ; Cell Line, Tumor ; Cell-Penetrating Peptides ; chemical synthesis ; chemistry ; Cholesterol ; chemistry ; Drug Delivery Systems ; Liposomes ; Mice ; Oligopeptides ; chemical synthesis ; chemistry ; Particle Size ; Phospholipids ; chemistry ; Polyethylene Glycols